Note the box style in the product description
Sold and shipped flat in bundle quantities
Most styles fold together in seconds without tape
All sizes ship flat for easy storage and shipping convenience
All sizes ship flat to save on space
13 x 10 x 2 Brown Corrugated Deluxe Literature Mailers 50/Bundle 12x12 box Note the box style inAll of these Indestructo corrugated mailers boxes are designed to create a professional appearance for shipment of your catalogs, literature, parts, photos, printed material, etc. Note the box style in the product description. Choose from six styles: Standard Protective Mailers, Outside Tuck Mailers, RSC Boxes, Multi Depth Bookfolds, End Loading Mailers, and Jumbo Fold Over Mailers. Most styles fold together in seconds without tape, glue or staples.